[Intel-gfx] [PATCH 06/15] drm/i915: Refactor the physical and virtual page hws setup

[Daniel Vetter]

On Tue, Aug 05, 2014 at 07:51:17AM -0700, Rodrigo Vivi wrote:
> From: Chris Wilson <chris at chris-wilson.co.uk>
> 
> We duplicated the legacy physical HWS setup routine for no good reason.
> Combine it with the more recent virtual HWS setup for simplicity.
> 
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Signed-off-by: Rodrigo Vivi <rodrigo.vivi at intel.com>

The duplication is with the legacy ums code, which (hopefully) will
disappear shortly. So no need for this patch.
-Daniel

> ---
>  drivers/gpu/drm/i915/i915_dma.c         | 16 +------
>  drivers/gpu/drm/i915/intel_ringbuffer.c | 81 ++++++++++++++++-----------------
>  2 files changed, 39 insertions(+), 58 deletions(-)
> 
> diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
> index 2e7f03a..f76d2bf 100644
> --- a/drivers/gpu/drm/i915/i915_dma.c
> +++ b/drivers/gpu/drm/i915/i915_dma.c
> @@ -104,17 +104,6 @@ void i915_update_dri1_breadcrumb(struct drm_device *dev)
>  	}
>  }
>  
> -static void i915_write_hws_pga(struct drm_device *dev)
> -{
> -	struct drm_i915_private *dev_priv = dev->dev_private;
> -	u32 addr;
> -
> -	addr = dev_priv->status_page_dmah->busaddr;
> -	if (INTEL_INFO(dev)->gen >= 4)
> -		addr |= (dev_priv->status_page_dmah->busaddr >> 28) & 0xf0;
> -	I915_WRITE(HWS_PGA, addr);
> -}
> -
>  /**
>   * Frees the hardware status page, whether it's a physical address or a virtual
>   * address set up by the X Server.
> @@ -255,10 +244,7 @@ static int i915_dma_resume(struct drm_device *dev)
>  	}
>  	DRM_DEBUG_DRIVER("hw status page @ %p\n",
>  				ring->status_page.page_addr);
> -	if (ring->status_page.gfx_addr != 0)
> -		intel_ring_setup_status_page(ring);
> -	else
> -		i915_write_hws_pga(dev);
> +	intel_ring_setup_status_page(ring);
>  
>  	DRM_DEBUG_DRIVER("Enabled hardware status page\n");
>  
> diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
> index b3d8f76..b7894d1 100644
> --- a/drivers/gpu/drm/i915/intel_ringbuffer.c
> +++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
> @@ -443,17 +443,6 @@ u64 intel_ring_get_active_head(struct intel_engine_cs *ring)
>  	return acthd;
>  }
>  
> -static void ring_setup_phys_status_page(struct intel_engine_cs *ring)
> -{
> -	struct drm_i915_private *dev_priv = ring->dev->dev_private;
> -	u32 addr;
> -
> -	addr = dev_priv->status_page_dmah->busaddr;
> -	if (INTEL_INFO(ring->dev)->gen >= 4)
> -		addr |= (dev_priv->status_page_dmah->busaddr >> 28) & 0xf0;
> -	I915_WRITE(HWS_PGA, addr);
> -}
> -
>  static bool stop_ring(struct intel_engine_cs *ring)
>  {
>  	struct drm_i915_private *dev_priv = to_i915(ring->dev);
> @@ -511,10 +500,7 @@ static int init_ring_common(struct intel_engine_cs *ring)
>  		}
>  	}
>  
> -	if (I915_NEED_GFX_HWS(dev))
> -		intel_ring_setup_status_page(ring);
> -	else
> -		ring_setup_phys_status_page(ring);
> +	intel_ring_setup_status_page(ring);
>  
>  	/* Initialize the ring. This must happen _after_ we've cleared the ring
>  	 * registers with the above sequence (the readback of the HEAD registers
> @@ -1101,39 +1087,48 @@ void intel_ring_setup_status_page(struct intel_engine_cs *ring)
>  {
>  	struct drm_device *dev = ring->dev;
>  	struct drm_i915_private *dev_priv = ring->dev->dev_private;
> -	u32 mmio = 0;
> +	u32 mmio, addr;
>  
> -	/* The ring status page addresses are no longer next to the rest of
> -	 * the ring registers as of gen7.
> -	 */
> -	if (IS_GEN7(dev)) {
> -		switch (ring->id) {
> -		case RCS:
> -			mmio = RENDER_HWS_PGA_GEN7;
> -			break;
> -		case BCS:
> -			mmio = BLT_HWS_PGA_GEN7;
> -			break;
> -		/*
> -		 * VCS2 actually doesn't exist on Gen7. Only shut up
> -		 * gcc switch check warning
> +	if (!I915_NEED_GFX_HWS(dev)) {
> +		addr = dev_priv->status_page_dmah->busaddr;
> +		if (INTEL_INFO(ring->dev)->gen >= 4)
> +			addr |= (dev_priv->status_page_dmah->busaddr >> 28) & 0xf0;
> +		mmio = HWS_PGA;
> +	} else {
> +		addr = ring->status_page.gfx_addr;
> +		/* The ring status page addresses are no longer next to the rest of
> +		 * the ring registers as of gen7.
>  		 */
> -		case VCS2:
> -		case VCS:
> -			mmio = BSD_HWS_PGA_GEN7;
> -			break;
> -		case VECS:
> -			mmio = VEBOX_HWS_PGA_GEN7;
> -			break;
> +		if (IS_GEN7(dev)) {
> +			switch (ring->id) {
> +			default:
> +			case RCS:
> +				mmio = RENDER_HWS_PGA_GEN7;
> +				break;
> +			case BCS:
> +				mmio = BLT_HWS_PGA_GEN7;
> +				break;
> +				/*
> +				 * VCS2 actually doesn't exist on Gen7. Only shut up
> +				 * gcc switch check warning
> +				 */
> +			case VCS2:
> +			case VCS:
> +				mmio = BSD_HWS_PGA_GEN7;
> +				break;
> +			case VECS:
> +				mmio = VEBOX_HWS_PGA_GEN7;
> +				break;
> +			}
> +		} else if (IS_GEN6(ring->dev)) {
> +			mmio = RING_HWS_PGA_GEN6(ring->mmio_base);
> +		} else {
> +			/* XXX: gen8 returns to sanity */
> +			mmio = RING_HWS_PGA(ring->mmio_base);
>  		}
> -	} else if (IS_GEN6(ring->dev)) {
> -		mmio = RING_HWS_PGA_GEN6(ring->mmio_base);
> -	} else {
> -		/* XXX: gen8 returns to sanity */
> -		mmio = RING_HWS_PGA(ring->mmio_base);
>  	}
>  
> -	I915_WRITE(mmio, (u32)ring->status_page.gfx_addr);
> +	I915_WRITE(mmio, addr);
>  	POSTING_READ(mmio);
>  
>  	/*
> -- 
> 1.9.3
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch